US PATENT SUBCLASS 175 / 427
.~.~.~ For a mine roof drill bit type

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
425  DF  .~ Specific or diverse material {3}
426  DF  .~.~ Insert {2}
427.~.~.~ For a mine roof drill bit type

DEFINITION

Classification: 175/427

For a mine roof drill bit type:

(under subclass 426) Apparatus where the insert is in a cutting tooth secured with connecting means to a cutter head for obtaining solid state valuable minerals.